Jonkheer Sir Willem Boreel, 9th Baronet, Lord of Hogelanden, (24 March 1800 – 24 August 1883) was a Dutch politician who served as Speaker of the House of Representatives thrice in the period between 1847 and 1855, and as King's Commissioner of North Holland from 1855 until 1860.

His father, Jacob Boreel, served as commissioner and schepen of Amsterdam and as member of the provincial council of Holland,[1] and his mother was Margaretha Johanna Munter.

[1] From August to September 1840, he briefly served as extraordinary member of the House of Representatives for the province of Holland, tasked with reviewing the Constitution's first amendment since 1815.

In March 1848, he was summoned by King William II who, pressured by the Revolutions of 1848 elsewhere in Europe, declared to Boreel that he was willing to agree to a constitutional revision, and that he had taken this decision without consulting his ministers.

However, his efforts were in vain, and the king appointed a constitutional review committee comprising radical liberals, chaired by Johan Rudolph Thorbecke.

As a member of the House of Representatives, Boreel opposed Thorbecke's ministry, in particular foreign minister Herman van Sonsbeeck's policy regarding the Duchy of Limburg and the German Confederation.

[3] In 1851, Speaker of the House Albertus Jacobus Duymaer van Twist was appointed Governor-General of the Dutch East Indies, and Boreel was elected to succeed him.